The county of Cheshire contains a number of smallish lakes, or meres. Many date back to the glacial period of the last ice age, ‘occupying hollows in the glacial drift surface of the Cheshire Plain’ (see itemised list). The lake in Tatton Park, known as Tatton Mere, is one of these meres of glacial origin.
Just north west of the top of Tatton Mere lies a smaller lake, named Melchett Mere, but at a noticeably lower elevation. Is this another glacial lake? It seems not. Cheshire also has a history of salt extraction and mining, notably in the area around nearby Northwich and Wincham from the 17th century. Uncontrolled mining activity led to great subsidences of ground and the formation of lakes, such as the notorious Ashton’s and Neumann’s flashes near Wincham.
Effects of the salt mining activites, and particularly wild brine pumping, were often felt many miles away. According to the National Trust, Melchett Mere in Tatton Park was formed by a sudden collapse in 1922. The resulting lake was named by Lord Egerton after the then chairman of the extractive company he believed to have been responsible (presumably Henry Mond, 2nd Baron Melchett, who became deputy chairman of ICI in the 1940s).
Subsidence due to brine pumping activities is serious business in Cheshire, as evidence by the existence of the Brine Subsidence Compensation Board. Some of the land in this area is still subsiding. Notably this lies on the proposed route for the HS2 high speed train. I hope those guys know what they’re getting into!